UCC281 [TI]

具有 -40°C 至 +85°C 工作温度范围和反向电流保护功能的 1A、低压降稳压器;
UCC281
型号: UCC281
厂家: TEXAS INSTRUMENTS    TEXAS INSTRUMENTS
描述:

具有 -40°C 至 +85°C 工作温度范围和反向电流保护功能的 1A、低压降稳压器

电源电路 线性稳压器IC
文件: 总10页 (文件大小:101K)
中文:  中文翻译
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UCC281-3/-5/-ADJ  
UCC381-3/-5/-ADJ  
Low Dropout 1 Ampere Linear Regulator Family  
DESCRIPTION  
FEATURES  
The UCC381-3/-5/-ADJ family of positive linear series pass regulators is  
tailored for low drop out applications where low quiescent power is impor-  
tant. Fabricated with a BiCMOS technology ideally suited for low input to  
output differential applications, the UCC381 will pass 1A while requiring  
only 0.5V of input voltage headroom. Dropout voltage decreases linearly  
with output current, so that dropout at 200mA is less than 100mV. Quies-  
cent current is always less than 650µA. To prevent reverse current conduc-  
tion, on-chip circuitry limits the minimum forward voltage to typically 50mV.  
Once the forward voltage limit is reached, the input-output differential volt-  
age is maintained as the input voltage drops until undervoltage lockout dis-  
ables the regulator.  
Precision Positive Linear Voltage  
Regulation  
0.5V Dropout at 1A  
Guaranteed Reverse Input/ Output  
Voltage Isolation with Low Leakage  
Low Quiescent Current Irrespective of  
Load  
Adjustable Output Voltage Version  
Fixed Versions for 3.3V and 5V  
Outputs  
UCC381-3 and UCC381-5 versions have on-chip resistor networks preset  
to regulate either 3.3V or 5.0V, respectively. Furthermore, remote sensing  
of the load voltage is possible by connecting the VOUTS pin directly at the  
load. The output voltage is then regulated to 1.5% at room temperature and  
better than 2.5% over temperature. The UCC381-ADJ version has a regu-  
lated output voltage programmed by an external user-definable resistor ra-  
tio.  
Logic Shutdown Capability  
Short Circuit Power Limit of  
3% V Current Limit  
IN  
Remote Load Voltage for Accurate  
Load Regulation  
(continued)  
BLOCK DIAGRAM  
VIN  
8
1
4
VOUT  
V
PUMP  
VOUTS  
VOLTAGE  
AMPLIFIER  
CURRENT  
LIMIT  
R2  
R1  
+
+
1.3/2.1A  
CURRENT  
REFERENCE  
2
3
6
7
GND  
GND  
GND  
GND  
1.25V  
SHUTDOWN FOR FIXED VERSIONS  
CT*  
5
0.65V  
3% DUTY CYCLE  
CURRENT LIMIT TIMER  
*ADJ  
VERSION  
ONLY  
R2  
0
R1  
OPEN  
50k  
REVERSE VOLTAGE  
SENSE  
UCC381-ADJ  
UCC381-3  
UCC381-5  
UVLO  
82k  
150k  
THERMAL  
SHUTDOWN  
50k  
UDG-98112  
SLUS214B -JANUARY 2001  
UCC281-3/-5/-ADJ  
UCC381-3/-5/-ADJ  
CONNECTION DIAGRAMS  
ABSOLUTE MAXIMUM RATINGS  
VIN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9V  
CT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 to 3V  
Storage Temperature . . . . . . . . . . . . . . . . . . . 65°C to +150°C  
Junction Temperature. . . . . . . . . . . . . . . . . . . 55°C to +150°C  
Lead Temperature (Soldering, 10 sec.) . . . . . . . . . . . . . +300°C  
SOIC-8 (Top View)  
DP Package  
VOUT  
GND  
8
7
6
5
VIN  
1
2
3
4
GND  
GND  
CT*  
Currents are positive into, negative out of the specified terminal.  
Consult Packaging Section of Databook for thermal limitations  
and considerations of packages. All voltages are referenced to  
GND.  
GND  
VOUTS  
* ADJ version only  
DESCRIPTION (cont.)  
Short circuit current is internally limited. The device re-  
sponds to a sustained overcurrent condition by turning  
The UCC381 can be shutdown to 25µA (max) by pulling  
the CT pin low.  
off after a T  
delay. The device then stays off for a pe-  
ON  
Internal power dissipation is further controlled with ther-  
mal overload protection circuitry. Thermal shutdown oc-  
curs if the junction temperature exceeds 165°C. The chip  
will remain off until the temperature has dropped 20°C.  
riod, T  
, that is 32 times the T  
delay. The device  
ON  
OFF  
then begins pulsing on and off at the T  
duty cycle of 3%. This drastically reduces the power dis-  
sipation during short circuit such that heat sinking, if at all  
/(T +T  
)
ON  
ON OFF  
required, must only accommodate normal operation. On The UCC281 series is specified for operation over the in-  
the fixed output versions of the device TON is fixed at  
400µs a guaranteed minimum. On the adjustable ver-  
sion an external capacitor sets the on time. The off time  
dustrial range of 40°C to +85°C, and the UCC381 se-  
ries is specified from 0°C to +70°C. These devices are  
available in the 8 pin DP surface mount power package.  
For other packaging options consult the factory.  
is always 32 times T  
.
ON  
ELECTRICAL CHARACTERISTICS: Unless otherwise stated, these specifications hold for TA = 0°C to 70°C for the  
UCC381-X series and 40°C to +85°C for the UCC283-X series, VIN = VOUT + 1.5V, IOUT = 0mA, COUT = 2.2µF. CT = 1500pF for  
the UCC381-ADJ version and VOUT set to 5V. TJ = TA.  
PARAMETER  
UCC381-5 Fixed 5V, 1A Family  
Output Voltage  
TEST CONDITIONS  
MIN  
TYP  
MAX UNITS  
TJ = 25°C  
4.925  
4.875  
5
5.075  
5.125  
3
V
V
Over Temperature  
Line Regulation  
VIN = 5.15V to 9V  
1
2
mV  
mV  
V
Load Regulation  
IOUT = 0mA to 1A  
5
Drop Out Voltage, VIN – VOUT  
IOUT = 1A, VOUT = 4.85V, TA < 85°C  
IOUT = 200mA, VOUT = 4.85V, TA < 85°C  
VOUT = 0V  
0.5  
100  
2
0.6  
200  
3.5  
1.8  
5
mV  
A
Peak Current Limit  
Overcurrent Threshold  
Current Limit Duty Cycle  
Overcurrent Time Out, TON  
Quiescent Current  
1
A
VOUT = 0V  
VOUT = 0V  
3
%
400  
750  
400  
10  
1600  
650  
25  
µs  
µA  
µA  
V
Quiescent Current in Shutdown  
Shutdown Threshold  
VIN = 9V  
At CT Input  
0.25  
2.5  
0.65  
Reverse Leakage Current  
UVLO Threshold  
1V < VIN < VOUT, VOUT < 5.1V, at VOUT  
VIN where VOUT passes current  
75  
µA  
V
2.8  
3.0  
2
UCC281-3/-5/-ADJ  
UCC381-3/-5/-ADJ  
ELECTRICAL CHARACTERISTICS: Unless otherwise stated, these specifications hold for TA = 0°C to 70°C for the  
UCC381-X series and 40°C to +85°C for the UCC283-X series, VIN = VOUT + 1.5V, IOUT = 0mA, COUT = 2.2µF. CT = 1500pF for  
the UCC381-ADJ version and VOUT set to 5V. TJ = TA.  
PARAMETER  
UCC381-3 Fixed 3.3V, 1A Family  
Output Voltage  
TEST CONDITIONS  
MIN  
TYP  
MAX UNITS  
TJ = 25°C  
3.25  
3.22  
3.3  
3.35  
3.38  
3
V
V
Over Temperature  
Line Regulation  
VIN = 3.45V to 9V  
1
2
mV  
mV  
V
Load Regulation  
IOUT = 0mA to 1A  
5
Dropout Voltage, VIN - VOUT  
IOUT = 1A, VOUT = 3.15V, TA < 85°C  
IOUT = 200mA, VOUT = 3.15V, TA < 85°C  
VOUT = 0V  
0.6  
100  
2
0.8  
200  
3.5  
1.8  
5
mV  
A
Peak Current Limit  
Overcurrent Threshold  
1
A
Current Limit Duty Cycle  
Overcurrent Time Out, TON  
Quiescent Current  
VOUT = 0V  
VOUT = 0V  
3
%
400  
750  
400  
10  
1600  
650  
25  
µs  
µA  
µA  
V
Quiescent Current in Shutdown  
Shutdown Threshold  
VIN = 9V  
At CT Input  
0.25  
2.5  
0.65  
Reverse Leakage Current  
UVLO Threshold  
1V < VIN < VOUT, VOUT < 3.35V, at VOUT  
VIN where VOUT passes current  
75  
µA  
V
2.8  
3.0  
UCC381-ADJ Adjustable Output, 1A Family  
Regulating Voltage at ADJ Input  
TJ = 25°C  
1.23  
1.22  
1.25  
1.27  
1.28  
3
V
V
Over Temperature  
VIN = VOUT + 150mV to 9V  
IOUT = 0mA to 1A  
Line Regulation, at ADJ Input  
Load Regulation, at ADJ Input  
Dropout Voltage, VIN - VOUT  
1
2
mV  
mV  
V
5
IOUT = 1A, VOUT = 4.85V  
IOUT = 200mA, VOUT = 4.85V  
VOUT = 0V  
0.5  
100  
2
0.6  
200  
3.5  
1.8  
5
mV  
A
Peak Current Limit  
Overcurrent Threshold  
Current Limit Duty Cycle  
Overcurrent Time Out, TON  
Quiescent Current  
1
A
VOUT = 0V  
3
%
VOUT = 0V, CT = 1500pF  
400  
1000 1600  
µs  
µA  
µA  
V
400  
10  
650  
25  
Quiescent Current in Shutdown  
Shutdown Threshold  
VIN = 9V  
At CT Input  
0.25  
2.5  
0.65  
Reverse Leakage Current  
Bias Current at ADJ Input  
UVLO Threshold  
1V < VIN < VOUT, VOUT < 9V, at VOUT  
100  
250  
3.0  
µA  
nA  
V
100  
2.8  
VIN where VOUT passes current  
3
UCC281-3/-5/-ADJ  
UCC381-3/-5/-ADJ  
PIN DESCRIPTIONS  
spect to the required transient loading. For example, if  
the load is very dynamic, a large capacitor will smooth  
out the response to load steps.  
CT: For UCC381-3 and UCC381-5 versions, this is the  
shutdown pin which, when pulled low, turns off the regu-  
lator output and puts the device in a low current state.  
For the UCC381-ADJ version, a capacitor is required be-  
VOUTS: Feedback for regulator sensing of the output  
voltage. For loads which are a considerable resistive dis-  
tance from the VOUT pin, the VOUTS pin can be used to  
move the resistance into the control loop of the regulator,  
thereby effectively canceling the IR drop associated with  
the load path. For local regulation, merely connect this  
pin directly to the VOUT pin. For the UCC381-ADJ ver-  
sion, the output voltage can be set by two external resi-  
tors according to the following relationship:  
tween the CT pin and GND to set the T  
overcurrent according to the following (typical) equation:  
time during  
ON  
TON = 660,000 CCT  
GND: All voltages are measured with respect to this pin.  
This is the low noise ground reference input for regula-  
tion. The output decoupling capacitor should be tied to  
PIN 7.  
VIN: Positive supply input for the regulator. Bypass this  
pin to GND with at least 1µF of low ESR, ESL capaci-  
tance if the source is located further than 1 inch from the  
device.  
R2  
VOUT =1.251+  
R1  
VOUT: Output for regulator. The regulator does not re- where R1 is a resistor connected between VOUT and  
quire a minimum output capacitor for stability. Choose VOUTS and R2 is a resistor connected between VOUTS  
the appropriate size capacitor for the application with re- and GND.  
TYPICAL APPLICATION CIRCUIT  
CT  
NOTE 2  
SHUTDOWN  
R2  
NOTE 1  
5
CT  
4
1
VOUTS  
VOUT  
VIN  
R1  
NOTE 1  
UCC381  
8
VIN  
OUTPUT  
1.0µF  
GND GND GND GND  
COUT  
7
6
3
2
UDG-98148  
Note 1: R1 and R2 for adjustable version only. For 3.3V and 5V versions connect VOUT to VOUTS. See Pin Descriptions.  
Note 2: CT timing capacitor is for adjustable version only. For 3.3V and 5V versions, the CT pin is used to enable or shutdown  
the part. See Pin Descriptions.  
4
UCC281-3/-5/-ADJ  
UCC381-3/-5/-ADJ  
APPLICATION INFORMATION  
Overview  
A capacitive load on the regulator’s output will appear as a  
short circuit during start-up. If the capacitance is too large,  
the output voltage will not come into regulation during the  
The UCC381 family of low dropout linear (LDO) regula-  
tors provide a regulated output voltage for applications  
with up to 1A of load current. The regulator features a  
low dropout voltage and short circuit protection, making  
their use ideal for demanding high current applications  
requiring fault tolerance.  
initial T  
period and the UCC381 will enter pulsed mode  
ON  
operation. The peak current limit, T  
period, and load  
ON  
characteristics determine the maximum value of output ca-  
pacitor that can be charged. For a constant current load  
the maximum output capacitance is given as follows:  
Short Circuit Protection  
TON  
(1)  
COUT max = I ILOAD  
Farads  
(
)
CL  
(
)
The UCC381 provides unique short circuit protection  
circuitry that reduces power dissipation during a fault.  
When an overload situation is detected, the device en-  
ters a pulsed mode of operation at 3% duty cycle re-  
ducing the heat sink requirements during a fault. The  
UCC381 has two current thresholds that determine its  
behavior during a fault as shown in Fig. 1.  
VOUT  
For worst case calculations the minimum values of on time  
(T ) and peak current limit (I ) should be used. The ad-  
ON  
CL  
justable version allows the T  
time to be adjusted with a  
ON  
capacitor on the CT pin:  
TON adj µsec = 660,000 C µFarads  
(2)  
(
)
(
)
(
)
When the regulator current exceeds the Overcurrent  
For a resistive load (R  
) the maximum output capacitor  
LOAD  
Threshold for a period longer than the T , the  
ON  
can be estimated from:  
UCC381 shuts off for a period (T  
) which is 32 times  
OFF  
T
. If the short circuit current exceeds the Peak Cur-  
ON  
COUT max  
=
)
(3)  
(
rent Limit, the regulator limits the current to peak cur-  
rent limit during the T period. The peak current limit  
TON  
ON  
Farads  
is nominally 1 Amp greater than the overcurrent thresh-  
old. The regulator will continue in pulsed mode until the  
fault is cleared as illustrated in Fig. 1.  
1
RLOAD ln  
VOUT  
1−  
ICL RLOAD  
OVERLOAD  
OUTPUT  
CURRENT  
PEAK CURRENT  
LIMIT  
I
O (nom)  
OVERCURRENT  
THRESHOLD  
VO  
(nom)  
ROL ICL  
OUTPUT  
VOLTAGE  
TON  
TON  
TON  
32TON  
32TON  
32TON  
UDG-98150  
Figure 1. UCC381 short circuit timing.  
5
UCC281-3/-5/-ADJ  
UCC381-3/-5/-ADJ  
APPLICATION INFORMATION (cont.)  
Dropout Performance  
Vout = 3V  
Vout = 3.3V  
Vout = 5V  
Referring to the Block Diagram, the dropout voltage of  
0.8  
0.7  
0.6  
0.5  
0.4  
0.3  
0.2  
0.1  
0
the UCC381 is equal to the minimum voltage drop (V to  
IN  
V
) across the N-Channel MOSFET. The dropout volt-  
OUT  
age is dependent on operating conditions such as load  
current, input and load voltages, as well as temperature.  
The UCC381 achieves a low Rds  
through the use of  
(ON)  
an internal charge-pump (V  
) that drives the MOS-  
PUMP  
FET gate. Fig. 2 depicts typical dropout voltages versus  
load current for the 3.3V and 5V versions of the part, as  
well as the adjustable version programmed to 3.0V.  
Fig. 3 depicts the typical dropout performance of the ad-  
justable version with various output voltages and load  
currents.  
0.2  
0.4  
0.6  
IOUT(A)  
0.8  
1
Operating temperatures effect the RDS(ON) and dropout  
voltage of the UCC381. Fig. 4 graphs the typical dropout  
for the 3.3V and 5V versions with a 3A load over tem-  
perature.  
Figure 2. Typical dropout vs. load current.  
DROP (3V)  
DROP (5V)  
Voltage Programming  
0.8  
0.7  
0.6  
0.5  
0.4  
Referring to the Typical Application Circuit, the output  
voltage for the adjustable version is externally pro-  
grammed through a resistive divider at the VOUTS pin as  
shown.  
R2  
R1  
(4)  
VOUT =1.251+  
Volts  
For the fixed Voltage versions the resistive divider is in-  
ternally set, and the VOUTS pin should be connected to  
the VOUT pin. The maximum programmed output volt-  
age for the adjustable part is constrained by the 9V ab-  
solute rating of the IC (including the charge pump  
voltage) and its ability to enhance the N-Channel MOS-  
FET. Unless the load current is well below the 1A rating  
of the device, output voltages above 7V are not recom-  
mended. The minimum output voltage can be pro-  
grammed down to 1.25V, however, the input voltage  
must always be greater than the UVLO of the part.  
-40  
-20  
0
20  
40  
60  
80  
TEMPERATURE (°C)  
Figure 4. Typical dropout vs. temperature (1A load).  
Iout = 0.2A  
Iout = 0.5A  
Iout = 1.0A  
0.7  
0.6  
0.5  
0.4  
0.3  
0.2  
0.1  
0
Shutdown Feature  
All versions include a shutdown feature, limiting quies-  
cent current to 25µA typical. The UCC381 is shut down  
by pulling the CT pin to below 0.25V. As shown in the  
applications circuit, a small logic level MOSFET or BJT  
transistor connected to the CT pin can be driven with a  
digital signal, putting the device in shutdown. If the CT  
pin is not pulled low, the IC will internally pull up on the  
pin, enabling the regulator. The CT pin should not be  
forced high, as this will interfere with the short circuit pro-  
tection feature. Selection of the timing capacitor for the  
adjustable version is explained in the Short Circuit Pro-  
tection section.  
3
3.5  
4
4.5  
5
VOUT (V)  
Figure 3. Typical dropout voltate vs. I  
and V  
OUT.  
OUT  
6
UCC281-3/-5/-ADJ  
UCC381-3/-5/-ADJ  
APPLICATION INFORMATION (cont.)  
Thermal Design  
mal resistance is required by the application, the device  
heat sinking would need to be improved.  
The Packing Information section of the data book con-  
tains reference material for the thermal ratings of various  
packages. The section also includes an excellent article  
Thermal Characteristics of Surface Mount Packages, that  
is the basis of the following discussion.  
When the UCC381 regulator is in pulsed mode, due to  
an overload or short circuit in the application, the maxi-  
mum average power dissipation is calculated as follows:  
PPULSE avg  
=
)
(6)  
(
Thermal design for the UCC381 includes two modes of  
operation, normal and pulsed mode. In normal operation,  
the linear regulator and heat sink must dissipate power  
equal to the maximum forward voltage drop multiplied by  
the maximum load current. Assuming a constant current  
load, the expected heat rise at the regulator’s junction  
can be calculated as follows:  
TON  
V
(
VOUT I  
CL  
Watts  
)
IN  
33 TON  
As seen in equation 6, the average power during a fault  
is reduced dramatically by the duty cycle, allowing the  
heat sink to be sized for normal operation. Although the  
peak power in the regulator during the T period can be  
significant, the thermal mass of the package will gener-  
ally keep the junction temperature from rising unless the  
ON  
TRISE =PDISS • θ jc + θca °C  
(5)  
(
)
Where theta is thermal resistance and P  
is the power  
DISS  
T
period is increased to tens of milliseconds.  
ON  
dissipated. The thermal resistance of both the SOIC-8  
DP package (junction to case) is 22 degrees Celsius per  
Watt. In order to prevent the regulator from going into  
thermal shutdown, the case to ambient theta must keep  
the junction temperature below 150C. If the LDO is  
mounted on a 5 square inch pad of 1 ounce copper, for  
example, the thermal resistance from junction to ambient  
becomes 40-70 degrees Celsius per Watt. If a lower ther-  
Ripple Rejection  
Even though the UCC381 linear regulators are not opti-  
mized for fast transient applications (Refer to UC182  
“Fast LDO Linear Regulator”), they do offer significant  
power supply rejection at lower frequencies. Fig 5. de-  
picts ripple rejection performance in a typical application.  
The performance can be improved with additional filter-  
ing.  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
10uF,  
IOUT = 100mA  
1uF, IOUT = 100mA  
10uF, IOUT = 1A  
1uF, IOUT = 1A  
1.0E+02  
1.0E+03  
1.0E+04  
1.0E+05  
FREQUENCY  
Figure 5. Ripple rejection vs. frequency.  
UNITRODE CORPORATION  
7 CONTINENTAL BLVD. • MERRIMACK, NH 03054  
TEL. (603) 424-2410 • FAX (603) 424-3460  
7
PACKAGE OPTION ADDENDUM  
www.ti.com  
4-Nov-2005  
PACKAGING INFORMATION  
Orderable Device  
UCC281DP-5  
Status (1)  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
ACTIVE  
Package Package  
Pins Package Eco Plan (2) Lead/Ball Finish MSL Peak Temp (3)  
Qty  
Type  
Drawing  
SOIC  
D
8
8
8
8
8
8
8
8
8
8
8
8
8
8
8
75 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
UCC281DP-ADJ  
UCC281DPTR-5  
UCC281DPTR-5G4  
UCC281DPTR-ADJ  
UCC281DPTR-ADJG4  
UCC381DP-3  
SOIC  
SOIC  
SOIC  
SOIC  
SOIC  
SOIC  
SOIC  
SOIC  
SOIC  
SOIC  
SOIC  
SOIC  
SOIC  
SOIC  
D
D
D
D
D
D
D
D
D
D
D
D
D
D
75 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
2500 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
2500 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
2500 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
2500 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
75 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
UCC381DP-5  
75 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
UCC381DP-ADJ  
UCC381DP-ADJG4  
UCC381DPTR-3  
UCC381DPTR-3G4  
UCC381DPTR-5  
UCC381DPTR-ADJ  
UCC381DPTR-ADJG4  
75 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
75 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
2500 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
2500 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
2500 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
2500 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
2500 Green (RoHS & CU NIPDAU Level-2-260C-1 YEAR  
no Sb/Br)  
(1) The marketing status values are defined as follows:  
ACTIVE: Product device recommended for new designs.  
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.  
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in  
a new design.  
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.  
OBSOLETE: TI has discontinued the production of the device.  
(2)  
Eco Plan  
-
The planned eco-friendly classification: Pb-Free (RoHS) or Green (RoHS  
&
no Sb/Br)  
-
please check  
http://www.ti.com/productcontent for the latest availability information and additional product content details.  
TBD: The Pb-Free/Green conversion plan has not been defined.  
Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements  
for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered  
at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes.  
Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame  
retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material)  
(3)  
MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder  
temperature.  
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is  
provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the  
Addendum-Page 1  
PACKAGE OPTION ADDENDUM  
www.ti.com  
4-Nov-2005  
accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take  
reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on  
incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited  
information may not be available for release.  
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI  
to Customer on an annual basis.  
Addendum-Page 2  
IMPORTANT NOTICE  
Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications,  
enhancements, improvements, and other changes to its products and services at any time and to discontinue  
any product or service without notice. Customers should obtain the latest relevant information before placing  
orders and should verify that such information is current and complete. All products are sold subject to TI’s terms  
and conditions of sale supplied at the time of order acknowledgment.  
TI warrants performance of its hardware products to the specifications applicable at the time of sale in  
accordance with TI’s standard warranty. Testing and other quality control techniques are used to the extent TI  
deems necessary to support this warranty. Except where mandated by government requirements, testing of all  
parameters of each product is not necessarily performed.  
TI assumes no liability for applications assistance or customer product design. Customers are responsible for  
their products and applications using TI components. To minimize the risks associated with customer products  
and applications, customers should provide adequate design and operating safeguards.  
TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right,  
copyright, mask work right, or other TI intellectual property right relating to any combination, machine, or process  
in which TI products or services are used. Information published by TI regarding third-party products or services  
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Use of such information may require a license from a third party under the patents or other intellectual property  
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Reproduction of information in TI data books or data sheets is permissible only if reproduction is without  
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Resale of TI products or services with statements different from or beyond the parameters stated by TI for that  
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Following are URLs where you can obtain information on other Texas Instruments products and application  
solutions:  
Products  
Applications  
Audio  
Amplifiers  
amplifier.ti.com  
www.ti.com/audio  
Data Converters  
dataconverter.ti.com  
Automotive  
www.ti.com/automotive  
DSP  
dsp.ti.com  
Broadband  
Digital Control  
Military  
www.ti.com/broadband  
www.ti.com/digitalcontrol  
www.ti.com/military  
Interface  
Logic  
interface.ti.com  
logic.ti.com  
Power Mgmt  
Microcontrollers  
power.ti.com  
Optical Networking  
Security  
www.ti.com/opticalnetwork  
www.ti.com/security  
www.ti.com/telephony  
www.ti.com/video  
microcontroller.ti.com  
Telephony  
Video & Imaging  
Wireless  
www.ti.com/wireless  
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Texas Instruments  
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Copyright 2005, Texas Instruments Incorporated  

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